Coke-drawing machine.



No. 727,943, PATENTED MAY 12',- 1 903."

J". A. HEBB. COKE DRAWING MACHINE.

APPLICATION FILED 0012. 1902. I

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PATENTBD MAY 12, 1903.

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J. A. HEBB. 00KB DRAWING MACHINE.

APPLICATION FILED 0013.2, 1902.

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NO MODEL.

PATENTED MAY 12, 1903. J. A. HEBB. COKE DRAWING MACHINE.

. APPLICATION FILED 0012, 1902.

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no MODEL.

Patented. May 12, 1903.

ATENT FFICE.

JOHN A. HEBB, OF UNIONTOWN, PENNS YLVANIA, ASSIGNOR TO THE IIEBB COKE DRAWER COMPANY, OF UNION'IOWN, PENNSYLVANIA.

COKE-DRAWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 727,943, dated May 12, 1903. Application filed October 2, 1902. Serial No. 125,644.. '(No modeL) of which the following is a specification, reference being bad therein to the accompanying drawings, forming part of this specification, in which- Figure 1 is a plan view of my improved coke-drawing machine, showingitin position in front of an oven-door, portions of the conveying mechanism and the beam being broken away. Fig. 2 is a perspective detail view of the outer end of the beam. Fig. 3 is a vertical longitudinal section on the line III III of Fig. 1. Fig. 4 is a similar sectional view of the machine at right angles to Fig. 3, indicated by the line IV IV of Fig. 1. Fig. 5 is a view in side elevation, partly broken away, of the reciprocating beam and its pivoted scraper-head, showing the head depressed backwardly as in the act of entering an oven-door. Fig. 6 is a detail sectional view of the pivotal connection of the scraper.

My in vention relates to apparatus for drawing coke from the oven, wherein a traveling structure is provided with a reciprocating beam having a rake or scraper-head adapted to be extended into and withdrawn from the oven to empty the contents therefrom. :The present'applioation refers more particularly to the mechanism for normally holding the scraper extended.

Referring now to the drawings, A represents the framework of a portable carriage carrying a turn table B, upon which are mounted the various manipulative portions of the machine.

Mounted in suitable bearings is a main shaft 4, driven atone end by asuitable prime mover, as asteam-engine. Centrally. mounted in step-box 6 is a vertical shaft 7 in driving engagement with shaft 4 by bevel-gears 9 10, by which shaft 7 is continuously driven. The

beam supporting and beam manipulating framework and mechanism are mounted on the two main standards 22 22 at each side of the central shaft 7, which standards are secured to the upper side of the turn-table and are provided at their upper portion with pil-' low blocks or bearings 23, in which is mounted "the cross-shaft 24, provided at its middle portion centrally above the center of the machine with driving-pinions 25 in driving en- ;on entering the oven and to be automatically extended by means adapted to constantlyexert a backward pressure upon an arm or arms 35, rigidly connected to or forming a part of the scraper. The scraper itself may be of any desired or preferred construction, either a plate adapted to operate in the manner of a hoe or provided with forks or tines adapted to engage the coke in the manner of arake, and its specific construction is not essential to the present invention. The scraper is pivoted to the forward end of. the beam at32 or is attached, to or hung upon the beam in any manner which will admit of a'flexible connection therewith, permitting the scraper to be folded up underneath, as illustrated in Fig. 5, or topermit reciprocating movement of the beam While the lower portion or edge of the scraper is in engagementjwith the coke. The scraperis normallyheld extended at approximately a right angle to the beam, as

shown in Fig. 3,by means of a counterweighted crank-arm 33, pivoted to the beam atrany suitable point and adapted to exert a backward pressure through connecting-rod 34,secured to the crank-arm and to the end of arm or arms 35, respectively, whereby'the counterweight will 'always tend to draw backwardly upon the arms of thejscraperat whatever position the beam may assume, thereby constantly tending to extend the scraper to its normal operative position. As shown in Fig. 6, the forward end of the beam is provided with a shoulder or abutment 32, against which the body portion of the scraper bears above the pivot under tension of the rod, thus limiting its movement. The counterweight may be of any form or design and is preferably provided with a set-screw or other securing device by which its location on the arm maybe varied to varyits leverage.

On each side of the beam, freely journaled on shaft 24, are the conical friction-drums 36, provided on their inner portions with peripheral bevel-teeth 37, the teeth of both of such drums being in constant engagement with the driving bevel gear-wheel 38, secured to the upper end of shaft 7, by which both friction-drums are constantly driven in opposite directions. The hub of each drum bears out wardly against a collar 39, secured to shaft 2-1, by which the teeth 37 of the drum are held in mesh with driving-wheel 38. Beyond the friction-drums at each side is asurrounding friction-sleeve 40, each of which is provided with a hub portion in driving engagement with shaft 24: by a spline or key 41, so that when either of such sleeves is brought into frictional engagement with its drum by shifting the sleeve upon the drum it will transmit movement to shaft 24: in one direction or the other, according to which drum 36 is utilized. The shifting operation is secured through lever 42, pivoted at 43 and connected at 44 to a shifting bar 45, mounted in suitable hearings on the upright supports 22 and provided with forks 46, engaging collars or flanges on the hub of sleeve 40, as clearly shown in Figs. 1 and 4. By this construction when lever 42 is shifted in either direction but one of the friction-clutches will be engaged. and by adjusting the sleeves 40 so that in their intermediate inoperative position they are just clear of the frictiondrums the necessary movement of lever 42 is reduced to a minimum. By these means upon holding one of the pair of clutches in contact the powerof shaft7 will be imparted through bevel-wheel 38, drum 36 to its connected sleeve 40, and consequently to shaft 24, rotating pinions 25 in one direction, so as to carry the beam into the oven the desired distance, when the clutch is released. To reverse the operation, the opposite pair of clutches are thrown into engagement, consequently reversing the rotation of pinions 25 and withdrawing the beam as far as necessary to effect the withdrawal of the coke by the rake, when the clutches are again positively thrown out of engagement by the operator or will become automatically disengaged at any point by merely releasing pressure of the clutches. When the rake has been extended to the desired point in the oven and lowered upon the coke, a rapid alternative engagement of the clutches will impart a corresponding reciprocating movement of short range to the beam, when the points of the rake will be worked down into the coke, the pivotal joint providing for the longitudinal movement. The inner end of the beam is raised and lowered by operative mechanism under the control of the operator, so that the height of the rake may be varied at varying positions of the beam; but such mechanism does not form any part of the present invention.

Having described my invention, what I claim is 1. In apparatus for drawing coke, the combination with a reciprocating beam, of a pivotally-attached scraper adapted to be folded backwardly by contact with the coke, a counterweighted lever pivoted to the beam, and a connection between said counterweighted lever and the scraper by which the scraper is extended, substantially as set forth.

2. In apparatus for drawing coke, the combination with a reciprocating beam, of a pivotally-attached scraper adapted to be folded backwardly by contact with the coke, a counterweighted lever pivoted to the beam at its outer portion, and a connection between the counterweighted lever and the scraper by which the scraper is extended, substantially as set forth.

3. In apparatus for drawing coke, a beam provided at the forward end with a pivotal bearing and a limiting-shoulder at the forward end, a scraper pivotally secured inthe bearing adapted to be depressed backwardly by contact with the coke, a counterweighted lever, and a connection between said lever and scraper adapted to hold the scraper-in an extended position against the limiting-shoulder, substantially as set forth.

4. In apparatus for drawing coke, the combination with a reciprocating beam provided with a pivotally-attached scraper at its forward end; of a pivoted lever provided with a rearward ly and downwardly extended arm, a counterweight thereon, and an upwardly-extending lever-arm; and a connection between said lever-arm and the scraper by which the scraper is normally held extended, substantially as set forth.

5. In apparatus for drawing coke the combination with a reciprocating beam provided with a pivotally-attached scraper at its forward end; of a pivoted lever provided with a rearwardly and downwardly extending arm, acounterweight adjustably mounted thereon, and an upwardly-extending lever-arm; and a connection between the said lever-arm and the scraper by which the scraper is normally held extended, substantially as set forth.

6. In apparatus for drawing coke, the combination with a reciprocating beam, of a pivoted scraper and counterweighted mechanism connected with the scraper adapted to hold it normally extended, substantially as set forth. In testimony whereof I affix my signature in presence of two witnesses.

JOHN A. HEBB. lVitnesses:

G. M. CLARKE, R. H. MoLARN. 

